1. What is Radiator Heat Output Calculation?

Definition: This calculator estimates the heat output of a radiator based on temperature difference, heat transfer coefficient, and surface area.

Purpose: It helps HVAC professionals and homeowners determine the heating capacity of radiators for proper system design.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Heat output (BTU/h)
• \( \Delta T \) — Temperature difference between radiator and room (°F)
• \( K \) — Heat transfer coefficient (BTU/h·ft²·°F)
• \( A \) — Radiator surface area (ft²)

Explanation: The heat output increases with greater temperature difference, better heat transfer materials, and larger radiator surfaces.

3. Importance of Heat Output Calculation

Details: Proper heat output estimation ensures adequate room heating, energy efficiency, and correct radiator sizing.

4. Using the Calculator

Tips: Enter the temperature difference, heat transfer coefficient (default 1.5 BTU/h·ft²·°F for cast iron), and radiator surface area. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is ΔT in radiator calculations?
A: ΔT is the difference between radiator surface temperature and desired room temperature.

Q2: What are typical K values?
A: Cast iron radiators ~1.5, steel panel radiators ~2.5, copper/aluminum ~3.0 BTU/h·ft²·°F.

Q3: How do I measure radiator surface area?
A: Calculate total exposed surface area including fins and multiply by manufacturer's effective area factor.

Q4: Does this account for room insulation?
A: No, this calculates radiator output. Heat loss calculations should consider insulation separately.

Q5: How does water temperature affect output?
A: Higher water temperature increases radiator surface temperature, increasing ΔT and thus Q.